| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.18 103/339] selftests/bpf: fix stacktrace_build_id with missing kprobe/urandom_read | Date | Mon, 13 Jun 2022 12:08:48 +0200 |
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From: Song Liu <song@kernel.org>
[ Upstream commit 59ed76fe2f981bccde37bdddb465f260a96a2404 ]
Kernel function urandom_read is replaced with urandom_read_iter. Therefore, kprobe on urandom_read is not working any more:
[root@eth50-1 bpf]# ./test_progs -n 161 test_stacktrace_build_id:PASS:skel_open_and_load 0 nsec libbpf: kprobe perf_event_open() failed: No such file or directory libbpf: prog 'oncpu': failed to create kprobe 'urandom_read+0x0' \ perf event: No such file or directory libbpf: prog 'oncpu': failed to auto-attach: -2 test_stacktrace_build_id:FAIL:attach_tp err -2 161 stacktrace_build_id:FAIL
Fix this by replacing urandom_read with urandom_read_iter in the test.
Fixes: 1b388e7765f2 ("random: convert to using fops->read_iter()") Reported-by: Mykola Lysenko <mykolal@fb.com> Signed-off-by: Song Liu <song@kernel.org> Acked-by: David Vernet <void@manifault.com> Link: https://lore.kernel.org/r/20220526191608.2364049-1-song@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- tools/testing/selftests/bpf/progs/test_stacktrace_build_id.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/progs/test_stacktrace_build_id.c b/tools/testing/selftests/bpf/progs/test_stacktrace_build_id.c index 6c62bfb8bb6f..0c4426592a26 100644 --- a/tools/testing/selftests/bpf/progs/test_stacktrace_build_id.c +++ b/tools/testing/selftests/bpf/progs/test_stacktrace_build_id.c @@ -39,7 +39,7 @@ struct { __type(value, stack_trace_t); } stack_amap SEC(".maps"); -SEC("kprobe/urandom_read") +SEC("kprobe/urandom_read_iter") int oncpu(struct pt_regs *args) { __u32 max_len = sizeof(struct bpf_stack_build_id) -- 2.35.1
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